Cordierite and Foitite Physical Properties

Cordierite

Foitite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.663.17

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Handbook of mineralogy (2001)

1.6 Cleavage

Fair on {100}, poor on {001} and {010}

None

1.7 Mohs Hardness

7-7.57

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)

Cordierite and Foitite Chemical Formula

While comparing Cordierite and Foitite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Cordierite and Foitite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Foitite- Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

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Cordierite and Foitite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Foitite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Foitite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.17 whereas that of Foitite is 3.17.